trange letters sent to police in Green Bay and Oak Creek last Summer prompted a federal investigation. The FBI tells us test results have just come back and show agents could not find anything malicious

WASHINGTON - MARCH 09: The seal of the F.B.I. hangs in the Flag Room at the bureau's headquaters March 9, 2007 in Washington, DC. (Photo by Chip Somodevilla/Getty Images)

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MILWAUKEE -- Strange letters sent to police in Green Bay and Oak Creek last Summer prompted a federal investigation.

The FBI tells us test results have just come back and show agents could not find anything malicious.

Scenes of suspicious packages sent to Green Bay and Oak Creek Police this past Summer sent chills through the community.

A spokesperson for the FBI tells us test results shows they found nothing hazardous or any threat of violence. Although the packages looked similar, they were unrelated.

Captain Kevin Warych was the one who opened the suspicious package in Green Bay.

"Myself and the chief's secretary just felt light headed and you know like something that you know hits you right in the face," said Captain Warych.

Both were given the overdose drug Narcan as a precaution and were sent to the hospital.

"There was no powder there was nothing in there it just a blank piece of paper," explained Warych.

There was a similar scene at the Oak Creek Police Department the very next day back in August. A Lieutenant told TODAY'S TMJ4 they knew not to open the letter they received, thanks to the warning by Green Bay Police.

"Ours was not opened we received an email from Green Bay and our clerical staff noticed it had a similar envelope packaged envelope that was similar to Green Bay," said Lt. David Ashenhurst of Oak Creek Police in August of last year.

Captain Warych tells us he felt better about 45 minutes after the incident and was back to work the same day.

"So at this point it's unknown why we felt the way we did and going forward you know we just have to be more cautious about opening up packages," said Captain Warych.

The FBI sent us updated information Tuesday morning about whether they tracked down who sent these packages. Spokesman Leonard Peace tells us a person was interviewed in Green Bay. Agents learned the person was the victim of a scam and did not know what he was sending. Peace tells us because no hazardous materials were found in Oak Creek, they did not investigate this separate case any further.